CROSS REFERENCE TO RELATED PATENT APPLICATION
TECHNICAL FIELD
[0002] The present disclosure is generally related to wireless communications and, more
particularly, to techniques pertaining to short training field (STF) sequence design
for wide bandwidths in wireless communications.
BACKGROUND
[0003] Unless otherwise indicated herein, approaches described in this section are not prior
art to the claims listed below and are not admitted as prior art by inclusion in this
section.
[0004] In wireless communications, such as Wi-Fi (or WiFi) and wireless local area networks
(WLANs) in accordance with one or more Institute of Electrical and Electronics Engineers
(IEEE) 802.11 standards, achieving high throughput is one of the key objectives for
next-generation wireless connectivity. Wider bandwidths, such as 240MHz, 480MHz and
640MHz, have been considered as potential candidates for next-generation WLAN. However,
at present time, how to achieve high throughput in wide bandwidths, such as 240MHz,
480MHz and 640MHz, remains to be defined. Therefore, there is a need for a solution
of STF sequence design for wide bandwidths in wireless communications.
SUMMARY
[0005] The following summary is illustrative only and is not intended to be limiting in
any way. That is, the following summary is provided to introduce concepts, highlights,
benefits and advantages of the novel and non-obvious techniques described herein.
Select implementations are further described below in the detailed description. Thus,
the following summary is not intended to identify essential features of the claimed
subject matter, nor is it intended for use in determining the scope of the claimed
subject matter.
[0006] An objective of the present disclosure is to provide schemes, concepts, designs,
techniques, methods and apparatuses pertaining to STF sequence design for wide bandwidths
in wireless communications. Under various proposed schemes described herein, an STF
sequence design may be utilized for wide bandwidths such as 240MHz, 480MHz and 640MHz.
Moreover, several design options are proposed with peak-to-average power ratio (PAPR)
performance evaluated for comparison. It is believed that implementations of the proposed
schemes may address or otherwise alleviate aforementioned issues. A method and an
apparatus according to the invention are defined in the independent claims. The dependent
claims define preferred embodiments thereof.
[0007] In one aspect, a method may involve generating an STF of a physical-layer protocol
data unit (PPDU) by using a predefined STF base sequence. The method may also involve
performing a wireless communication in a 240MHz, 480MHz or 640MHz bandwidth with the
PPDU.
[0008] In another aspect, an apparatus may include a transceiver and a processor coupled
to the transceiver. The transceiver may be configured to transmit and receive wirelessly.
The processor may be configured to generate an STF of a PPDU by using a predefined
STF base sequence. The processor may also be configured to perform a wireless communication
in a 240MHz, 480MHz or 640MHz bandwidth with the PPDU.
[0009] It is noteworthy that, although description provided herein may be in the context
of certain radio access technologies, networks and network topologies such as, Wi-Fi,
the proposed concepts, schemes and any variation(s)/derivative(s) thereof may be implemented
in, for and by other types of radio access technologies, networks and network topologies
such as, for example and without limitation, Bluetooth, ZigBee, 5
th Generation (5G)/New Radio (NR), Long-Term Evolution (LTE), LTE-Advanced, LTE-Advanced
Pro, Internet-of-Things (IoT), Industrial IoT (IIoT) and narrowband IoT (NB-IoT).
Thus, the scope of the present disclosure is not limited to the examples described
herein.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The accompanying drawings are included to provide a further understanding of the
disclosure and are incorporated in and constitute a part of the present disclosure.
The drawings illustrate implementations of the disclosure and, together with the description,
serve to explain the principles of the disclosure. It is appreciable that the drawings
are not necessarily in scale as some components may be shown to be out of proportion
than the size in actual implementation to clearly illustrate the concept of the present
disclosure.
FIG. 1 is a diagram of an example network environment in which various solutions and
schemes in accordance with the present disclosure may be implemented.
FIG. 2 is a diagram of an example scenario in accordance with an implementation of
the present disclosure.
FIG. 3 is a diagram of an example scenario in accordance with an implementation of
the present disclosure.
FIG. 4 is a diagram of an example scenario in accordance with an implementation of
the present disclosure.
FIG. 5 is a diagram of an example scenario in accordance with an implementation of
the present disclosure.
FIG. 6 is a diagram of an example scenario in accordance with an implementation of
the present disclosure.
FIG. 7 is a diagram of an example scenario in accordance with an implementation of
the present disclosure.
FIG. 8 is a diagram of an example scenario in accordance with an implementation of
the present disclosure.
FIG. 9 is a block diagram of an example communication system in accordance with an
implementation of the present disclosure.
FIG. 10 is a flowchart of an example process in accordance with an implementation
of the present disclosure.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0011] Detailed embodiments and implementations of the claimed subject matters are disclosed
herein. However, it shall be understood that the disclosed embodiments and implementations
are merely illustrative of the claimed subject matters which may be embodied in various
forms. The present disclosure may, however, be embodied in many different forms and
should not be construed as limited to the exemplary embodiments and implementations
set forth herein. Rather, these exemplary embodiments and implementations are provided
so that description of the present disclosure is thorough and complete and will fully
convey the scope of the present disclosure to those skilled in the art. In the description
below, details of well-known features and techniques may be omitted to avoid unnecessarily
obscuring the presented embodiments and implementations.
Overview
[0012] Implementations in accordance with the present disclosure relate to various techniques,
methods, schemes and/or solutions pertaining to STF sequence design for wide bandwidths
in wireless communications. According to the present disclosure, a number of possible
solutions may be implemented separately or jointly. That is, although these possible
solutions may be described below separately, two or more of these possible solutions
may be implemented in one combination or another.
[0013] It is noteworthy that, in the present disclosure, a regular RU (rRU) refers to a
RU with tones that are continuous (e.g., adjacent to one another) and not interleaved,
interlaced or otherwise distributed. Moreover, a 26-tone regular RU may be interchangeably
denoted as RU26 (or rRU26), a 52-tone regular RU may be interchangeably denoted as
RU52 (or rRU52), a 106-tone regular RU may be interchangeably denoted as RU106 (or
rRU106), a 242-tone regular RU may be interchangeably denoted as RU242 (or rRU242),
and so on. Moreover, an aggregate (26+52)-tone regular multi-RU (MRU) may be interchangeably
denoted as MRU78 (or rMRU78), an aggregate (26+106)-tone regular MRU may be interchangeably
denoted as MRU132 (or rMRU132), an aggregate (484+242)-tone regular MRU may be interchangeably
denoted as MRU726 or MRU(484+242) (or rMRU726) and so on.
[0014] Since the above examples are merely illustrative examples and not an exhaustive listing
of all possibilities, the same applies to regular RUs, distributed-tone RUs, MRUs,
and distributed-tone MRUs of different sizes (or different number of tones). It is
also noteworthy that, in the present disclosure, a bandwidth of 20MHz may be interchangeably
denoted as BW20 or BW20M, a bandwidth of 40MHz may be interchangeably denoted as BW40
or BW40M, a bandwidth of 80MHz may be interchangeably denoted as BW80 or BW80M, a
bandwidth of 160MHz may be interchangeably denoted as BW160 or BW160M, a bandwidth
of 240MHz may be interchangeably denoted as BW240 or BW240M, a bandwidth of 320MHz
may be interchangeably denoted as BW320 or BW320M, a bandwidth of 480MHz may be interchangeably
denoted as BW480 or BW480M, and a bandwidth of 640MHz may be interchangeably denoted
as BW640 or BW640M.
[0015] FIG. 1 illustrates an example network environment 100 in which various solutions
and schemes in accordance with the present disclosure may be implemented. FIG. 2 ~
FIG. 10 illustrate examples of implementation of various proposed schemes in network
environment 100 in accordance with the present disclosure. The following description
of various proposed schemes is provided with reference to FIG. 1 ~ FIG. 10.
[0016] Referring to FIG. 1, network environment 100 may involve at least a station (STA)
110 communicating wirelessly with a STA 120. Either of STA 110 and STA 120 may function
as an access point (AP) STA or, alternatively, a non-AP STA. In some cases, STA 110
and STA 120 may be associated with a basic service set (BSS) in accordance with one
or more IEEE 802.11 standards (e.g., IEEE 802.11be and/or future-developed standards).
Each of STA 110 and STA 120 may be configured to communicate with each other by utilizing
the STF sequence design for wide bandwidths in wireless communications in accordance
with various proposed schemes described below. That is, either or both of STA 110
and STA 120 may function as a "user" in the proposed schemes and examples described
below. It is noteworthy that, while the various proposed schemes may be individually
or separately described below, in actual implementations some or all of the proposed
schemes may be utilized or otherwise implemented jointly. Of course, each of the proposed
schemes may be utilized or otherwise implemented individually or separately.
[0017] FIG. 2 illustrates an example scenario 200 in accordance with an implementation of
the present disclosure. Scenario 200 may pertain to RU/MRU for BW240, BW480 and BW640
considered in STF PAPR evaluations. Part (A) of FIG. 2 shows a list of RU/MUR types
(in terms of number of tones in a given RU/MRU) and respective numbers of RU/MRUs
transmittable in BW240. Part (B) of FIG. 2 shows a list of RU/MUR types (in terms
of number of tones in a given RU/MRU) and respective numbers of RU/MRUs transmittable
in BW480. Part (C) of FIG. 2 shows a list of RU/MUR types (in terms of number of tones
in a given RU/MRU) and respective numbers of RU/MRUs transmittable in BW640.
[0018] Under various proposed schemes in accordance with the present disclosure with respect
to ultra-high reliability (UHR) STF (UHR-STF) for wide bandwidths, a predefined STF
base sequence may be used in constructing or otherwise generating a UHR-STF for wide
bandwidths. For instance, an IEEE 802.11ax high-efficiency (HE) STF (HE-STF) may be
reused as a basic building sequence for UHR-STF for wide bandwidths such as 240MHz,
480MHz and 640MHz. Under the proposed scheme, for wide bandwidths of 240MHz, 480MHz
and 640MHz, an 80MHz HE-STF sequence and/or extreme-high throughput (EHT) STF (EHT-STF)
sequence may be reused, with additional coefficients applied on each 80MHz frequency
subblock or segment. Under the proposed schemes, an 80MHz segment sequence for downlink
(DL) multi-user (MU) PPDU (herein denoted as "EHTS80_1x") may be expressed as: EHTS80_1x
= [M, 1, (-1) * M, 0, (-1) * M, 1, (-1) * M]. Additionally, an 80MHz segment sequence
for uplink (UL) trigger-based (TB) PPDU (herein denoted as "EHTS80_2x") may be expressed
as: EHTS80_2x = [M, -1, M, -1, -M, -1, M, 0, -M, 1, M, 1, -M, 1, -M]. Here, M denotes
an 80MHz sub-sequence and M = [-1, -1, -1, 1, 1, 1, -1, 1, 1, 1, -1, 1, 1, -1, 1].
It is believed that the coefficients help improve PAPR performance over a variety
of RU sizes for 240MHz, 480MHz and 640MHz.
[0019] Under a proposed scheme in accordance with the present disclosure with respect to
STF sequence design for the 240MHz bandwidth, a UHR-STF for DL MU PPDU (herein denoted
as "UHRS
-1520:16:1520") and a UHR-STF for UL TB PPDU (herein denoted as "UHRS
-1528:8:1528") may be provided. The UHRS
-1520:16:1520 may be expressed as: UHRS
-1520:16:1520 = [c(1) * EHTS80_1x, 0, c(2) * EHTS80_1x, 0, c(3) * EHTS80_1x] * (1 +j) / sqrt(2).
Here, each of c(1), c(2) and c(3) represents a respective optimized coefficient. Under
the proposed scheme, with respect to UHR-STF for DL MU PPDU, a vector C of a combination
of optimized coefficients = [c(1) c(2) c(3)], and C = [1 -1 -1] or, alternatively,
C = [-1 -1 1] or, alternatively, C = [-1 1 1]. The UHRS
-1528:8:1528 may be expressed as: UHRS
-1528:8:1528 = [c(1) * EHTS80_2x, 0, c(2) * EHTS80_2x, 0, c(3) * EHTS80_2x] * (1 + j) / sqrt(2).
Here, each of c(1), c(2) and c(3) represents a respective optimized coefficient. Under
the proposed scheme, with respect to UHR-STF for UL TB PPDU, the vector C of a combination
of optimized coefficients = [c(1) c(2) c(3)], and C = [1 -1 -1] or, alternatively,
C = [-1 -1 1] or, alternatively, C = [-1 1 1]. It is noteworthy that the values of
the EHT-STF sequence at indices -8, -1016, -1032, -2040, 2040, 1032, 1016 and 8 may
be 0.
[0020] FIG. 3 illustrates an example scenario 300 of comparison of PAPR curves of STF and
data in a simulation for a DL MU PPDU in the 240MHz bandwidth. It is assumed that,
for DL, > 68% of spectrum is allocated. FIG. 4 illustrates an example scenario 400
of comparison of PAPR curves of STF and data in a simulation for an UL TB PPDU in
the 240MHz bandwidth. The RUs used in the simulations are MRU(2 x 996), MRU(2 x 996
+ 484) and MRU(3 x 996). As can be seen in FIG. 3 and FIG. 4, PAPR may be reduced
with use of the optimized coefficients, thereby improving PAPR performance.
[0021] Under a proposed scheme in accordance with the present disclosure with respect to
STF sequence design for the 480MHz bandwidth, a UHR-STF for DL MU PPDU (herein denoted
as "UHRS
-3056:16:3056") and a UHR-STF for UL TB PPDU (herein denoted as "UHRS
-3064:8:3064") may be provided. The UHRS
-3056:16:3056 may be expressed as: UHRS
-3056:16:3056 = [c(1) * EHTS80_1x, 0, c(2) * EHTS80_1x, 0, c(3) * EHTS80_1x, 0, c(4) * EHTS80_1x,
0, c(5) * EHTS80_1x, 0, c(6) * EHTS80_1x] * (1 + j) / sqrt(2). Here, each of c(1),
c(2), c(3), c(4), c(5) and c(6) represents a respective optimized coefficient. Under
the proposed scheme, with respect to UHR-STF for DL MU PPDU, a vector C of a combination
of optimized coefficients = [c(1) c(2) c(3) c(4) c(5) c(6)], and C = [1 1 1 1 -1 -1]
or, alternatively, C = [1 1 -1 -1 -1 -1]. The UHRS
-3064:8:3064 may be expressed as: UHRS
-3064:8:3064 = [c(1) * EHTS80_2x, 0, c(2) * EHTS80_2x, 0, c(3) * EHTS80_2x, 0, c(4) * EHTS80_2x,
0, c(5) * EHTS80_2x, 0, c(6) * EHTS80_2x] * (1 + j) / sqrt(2). Here, each of c(1),
c(2), c(3), c(4), c(5) and c(6) represents a respective optimized coefficient. Under
the proposed scheme, with respect to UHR-STF for UL TB PPDU, the vector C of a combination
of optimized coefficients = [c(1) c(2) c(3) c(4) c(5) c(6)], and C = [1 1 1 -1 -1
1] or, alternatively, C = [1 1 -1 1 -1 -1]. It is noteworthy that the values of the
EHT-STF sequence at indices -3064, -2056, -2040, -1032, -1016, 1016, 1032, 2040, 2056
and 3064 may be 0.
[0022] FIG. 5 illustrates an example scenario 500 of comparison of PAPR curves of STF and
data in a simulation for a DL MU PPDU in the 480MHz bandwidth. FIG. 6 illustrates
an example scenario 600 of comparison of PAPR curves of STF and data in a simulation
for an UL TB PPDU in the 480MHz bandwidth. The RUs used in the simulations are MRU(2
x 996), MRU(2 x 996 + 484) and MRU(3 x 996). As can be seen in FIG. 5 and FIG. 6,
PAPR may be reduced with use of the optimized coefficients, thereby improving PAPR
performance.
[0023] Under a proposed scheme in accordance with the present disclosure with respect to
STF sequence design for the 640MHz bandwidth, a UHR-STF for DL MU PPDU (herein denoted
as "UHRS
-3056:16:3056") and a UHR-STF for UL TB PPDU (herein denoted as "UHRS
-3064:8:3064") may be provided. The UHRS
-3056:16:3056 may be expressed as: UHRS
-3056:16:3056 = [c(1) * EHTS80_1x, 0, c(2) * EHTS80_1x, 0, c(3) * EHTS80_1x, 0, c(4) * EHTS80_1x,
0, c(5) * EHTS80_1x, 0, c(6) * EHTS80_1x, 0, c(7) * EHTS80_1x, 0, c(8) * EHTS80_1x]
* (1 + j) / sqrt(2). Here, each of c(1), c(2), c(3), c(4), c(5), c(6), c(7) and c(8)
represents a respective optimized coefficient. Under the proposed scheme, with respect
to UHR-STF for DL MU PPDU, a vector C of a combination of optimized coefficients =
[c(1) c(2) c(3) c(4) c(5) c(6) c(7) c(8)], and C = [1 -1 -1 -1 -1 -1 -1 1] or, alternatively,
C = [-1 1 1 1 1 1 1 -1]. The UHRS
-3064:8:3064 may be expressed as: UHRS
-3064:8:3064 = [c(1) * EHTS80_2x, 0, c(2) * EHTS80_2x, 0, c(3) * EHTS80_2x, 0, c(4) * EHTS80_2x,
0, c(5) * EHTS80_2x, 0, c(6) * EHTS80_2x, 0, c(7) * EHTS80_2x, 0, c(8) * EHTS80_2x]
* (1 + j) / sqrt(2). Here, each of c(1), c(2), c(3), c(4), c(5), c(6), c(7) and c(8)
represents a respective optimized coefficient. Under the proposed scheme, with respect
to UHR-STF for UL TB PPDU, the vector C of a combination of optimized coefficients
= [c(1) c(2) c(3) c(4) c(5) c(6) c(7) c(8)], and C = [1 1 1 -1 1 1 1 -1] or, alternatively,
C = [1 1 1 -1 1 1 -1 -1]. It is noteworthy that the values of the EHT-STF sequence
at indices -4088, -3080, -3064, -2056, -2040, -1032, -1016, 1016, 1032, 2040, 2056,
3064, 3080 and 4088 may be 0.
[0024] FIG. 7 illustrates an example scenario 700 of comparison of PAPR curves of STF and
data in a simulation for a DL MU PPDU in the 640MHz bandwidth. FIG. 8 illustrates
an example scenario 800 of comparison of PAPR curves of STF and data in a simulation
for an UL TB PPDU in the 640MHz bandwidth. The RUs used in the simulations are MRU(2
x 996), MRU(2 x 996 + 484) and MRU(3 x 996). As can be seen in FIG. 7 and FIG. 8,
PAPR may be reduced with use of the optimized coefficients, thereby improving PAPR
performance.
Illustrative Implementations
[0025] FIG. 9 illustrates an example system 900 having at least an example apparatus 910
and an example apparatus 920 in accordance with an implementation of the present disclosure.
Each of apparatus 910 and apparatus 920 may perform various functions to implement
schemes, techniques, processes and methods described herein pertaining to STF sequence
design for wide bandwidths in wireless communications, including the various schemes
described above with respect to various proposed designs, concepts, schemes, systems
and methods described above as well as processes described below. For instance, apparatus
910 may be an example implementation of communication entity 110, and apparatus 920
may be an example implementation of communication entity 120.
[0026] Each of apparatus 910 and apparatus 920 may be a part of an electronic apparatus,
which may be a STA or an AP, such as a portable or mobile apparatus, a wearable apparatus,
a wireless communication apparatus or a computing apparatus. For instance, each of
apparatus 910 and apparatus 920 may be implemented in a smartphone, a smart watch,
a personal digital assistant, a digital camera, or a computing equipment such as a
tablet computer, a laptop computer or a notebook computer. Each of apparatus 910 and
apparatus 920 may also be a part of a machine type apparatus, which may be an IoT
apparatus such as an immobile or a stationary apparatus, a home apparatus, a wire
communication apparatus or a computing apparatus. For instance, each of apparatus
910 and apparatus 920 may be implemented in a smart thermostat, a smart fridge, a
smart door lock, a wireless speaker or a home control center. When implemented in
or as a network apparatus, apparatus 910 and/or apparatus 920 may be implemented in
a network node, such as an AP in a WLAN.
[0027] In some implementations, each of apparatus 910 and apparatus 920 may be implemented
in the form of one or more integrated-circuit (IC) chips such as, for example and
without limitation, one or more single-core processors, one or more multi-core processors,
one or more reduced-instruction set computing (RISC) processors, or one or more complex-instruction-set-computing
(CISC) processors. In the various schemes described above, each of apparatus 910 and
apparatus 920 may be implemented in or as a STA or an AP. Each of apparatus 910 and
apparatus 920 may include at least some of those components shown in FIG. 9 such as
a processor 912 and a processor 922, respectively, for example. Each of apparatus
910 and apparatus 920 may further include one or more other components not pertinent
to the proposed scheme of the present disclosure (e.g., internal power supply, display
device and/or user interface device), and, thus, such component(s) of apparatus 910
and apparatus 920 are neither shown in FIG. 9 nor described below in the interest
of simplicity and brevity.
[0028] In one aspect, each of processor 912 and processor 922 may be implemented in the
form of one or more single-core processors, one or more multi-core processors, one
or more RISC processors or one or more CISC processors. That is, even though a singular
term "a processor" is used herein to refer to processor 912 and processor 922, each
of processor 912 and processor 922 may include multiple processors in some implementations
and a single processor in other implementations in accordance with the present disclosure.
In another aspect, each of processor 912 and processor 922 may be implemented in the
form of hardware (and, optionally, firmware) with electronic components including,
for example and without limitation, one or more transistors, one or more diodes, one
or more capacitors, one or more resistors, one or more inductors, one or more memristors
and/or one or more varactors that are configured and arranged to achieve specific
purposes in accordance with the present disclosure. In other words, in at least some
implementations, each of processor 912 and processor 922 is a special-purpose machine
specifically designed, arranged and configured to perform specific tasks including
those pertaining to STF sequence design for wide bandwidths in wireless communications
in accordance with various implementations of the present disclosure. For instance,
each of processor 912 and processor 922 may be configured with hardware components,
or circuitry, implementing one, some or all of the examples described and illustrated
herein.
[0029] In some implementations, apparatus 910 may also include a transceiver 916 coupled
to processor 912. Transceiver 916 may be capable of wirelessly transmitting and receiving
data. In some implementations, apparatus 920 may also include a transceiver 926 coupled
to processor 922. Transceiver 926 may include a transceiver capable of wirelessly
transmitting and receiving data.
[0030] In some implementations, apparatus 910 may further include a memory 914 coupled to
processor 912 and capable of being accessed by processor 912 and storing data therein.
In some implementations, apparatus 920 may further include a memory 924 coupled to
processor 922 and capable of being accessed by processor 922 and storing data therein.
Each of memory 914 and memory 924 may include a type of random-access memory (RAM)
such as dynamic RAM (DRAM), static RAM (SRAM), thyristor RAM (T-RAM) and/or zero-capacitor
RAM (Z-RAM). Alternatively, or additionally, each of memory 914 and memory 924 may
include a type of read-only memory (ROM) such as mask ROM, programmable ROM (PROM),
erasable programmable ROM (EPROM) and/or electrically erasable programmable ROM (EEPROM).
Alternatively, or additionally, each of memory 914 and memory 924 may include a type
of non-volatile random-access memory (NVRAM) such as flash memory, solid-state memory,
ferroelectric RAM (FeRAM), magnetoresistive RAM (MRAM) and/or phase-change memory.
[0031] Each of apparatus 910 and apparatus 920 may be a communication entity capable of
communicating with each other using various proposed schemes in accordance with the
present disclosure. For illustrative purposes and without limitation, a description
of capabilities of apparatus 910, as communication entity 110, and apparatus 920,
as communication entity 120, is provided below in the context of example process 1000.
It is noteworthy that, although the example implementations described below are provided
in the context of WLAN, the same may be implemented in other types of networks. Thus,
although the following description of example implementations pertains to a scenario
in which apparatus 910 functions as a transmitting device and apparatus 920 functions
as a receiving device, the same is also applicable to another scenario in which apparatus
910 functions as a receiving device and apparatus 920 functions as a transmitting
device.
Illustrative Processes
[0032] FIG. 10 illustrates an example process 1000 in accordance with an implementation
of the present disclosure. Process 1000 may represent an aspect of implementing various
proposed designs, concepts, schemes, systems and methods described above. More specifically,
process 1000 may represent an aspect of the proposed concepts and schemes pertaining
to STF sequence design for wide bandwidths in wireless communications in accordance
with the present disclosure. Process 1000 may include one or more operations, actions,
or functions as illustrated by one or more of blocks 1010 and 1020. Although illustrated
as discrete blocks, various blocks of process 1000 may be divided into additional
blocks, combined into fewer blocks, or eliminated, depending on the desired implementation.
Moreover, the blocks/sub-blocks of process 1000 may be executed in the order shown
in FIG. 10 or, alternatively in a different order. Furthermore, one or more of the
blocks/sub-blocks of process 1000 may be executed repeatedly or iteratively. Process
1000 may be implemented by or in apparatus 910 and apparatus 920 as well as any variations
thereof. Solely for illustrative purposes and without limiting the scope, process
1000 is described below in the context of apparatus 910 as communication entity 110
(e.g., a STA or AP) and apparatus 920 as communication entity 120 (e.g., a peer STA
or AP) of a wireless network such as a WLAN in accordance with one or more of IEEE
802.11 standards. Process 1000 may begin at block 1010.
[0033] At 1010, process 1000 may involve processor 912 of apparatus 910 generating an STF
of a PPDU by using a predefined STF base sequence. Process 1000 may proceed from 1010
to 1020.
[0034] At 1020, process 1000 may involve processor 912 performing, via transceiver 916,
a wireless communication (e.g., with apparatus 920) in a 240MHz, 480MHz or 640MHz
bandwidth with the PPDU.
[0035] In some implementations, the predefined STF base sequence may include an IEEE 802.11ax
80MHz HE-STF or IEEE 802.1The EHT-STF sequence. In such cases, in generating the STF,
process 1000 may involve processor 912 repeating the 80MHz HE-STF or EHT-STF sequence
and applying a combination of coefficients on each 80MHz frequency subblock or segment
of the 240MHz, 480MHz or 640MHz bandwidth.
[0036] In some implementations, in generating the STF, process 1000 may involve processor
912 generating the STF of a DL MU PPDU or an UL TB PPDU based on: (i) M = [-1, -1,
-1, 1, 1, 1, -1, 1, 1, 1, -1, 1, 1, -1, 1]; (ii) EHTS80_1x = [M, 1, (-1) * M, 0, (-1)
* M, 1, (-1) * M]; and (iii) EHTS80_2x = [M, -1, M, -1, -M, -1, M, 0, -M, 1, M, 1,
-M, 1, -M]. Here, M denotes an 80MHz sub-sequence, EHTS80_1x denotes an 80MHz segment
sequence for the DL MU PPDU, and EHTS80_2x denotes an 80MHz segment sequence for the
UL TB PPDU.
[0037] In some implementations, in generating the STF, process 1000 may involve processor
912 generating a UHR-STF of a DL MU PPDU using a combination of optimized coefficients
such that the STF is used in the wireless communication in the 240MHz bandwidth to
generate UHRS
-1520:16:1520 = [c(1) * EHTS80_1x, 0, c(2) * EHTS80_1x, 0, c(3) * EHTS80_1x] * (1 + j) / sqrt(2).
Here, UHRS
-1520:16:1520 denotes the UHR-STF of the DL MU PPDU, each of c(1), c(2) and c(3) represents a respective
optimized coefficient, a vector C of the combination of the optimized coefficients
= [c(1) c(2) c(3)], and C = [1 -1 -1] or C = [-1 -1 1] or C = [-1 1 1].
[0038] In some implementations, in generating the STF, process 1000 may involve processor
912 generating a UHR-STF of an UL TB PPDU using a combination of optimized coefficients
such that the STF is used in the wireless communication in the 240MHz bandwidth to
generate UHRS
-1528:8:1528 = [c(1) * EHTS80_2x, 0, c(2) * EHTS80_2x, 0, c(3) * EHTS80_2x] * (1 + j) / sqrt(2).
Here, UHRS
-1528:8:1528 denotes the UHR-STF of the UL TB PPDU, each of c(1), c(2) and c(3) represents a respective
optimized coefficient, a vector C of the combination of the optimized coefficients
= [c(1) c(2) c(3)], and C = [1 -1 -1] or C = [-1 -1 1] or C = [-1 1 1].
[0039] In some implementations, in generating the STF, process 1000 may involve processor
912 generating a UHR-STF of a DL MU PPDU using a combination of optimized coefficients
such that the STF is used in the wireless communication in the 480MHz bandwidth to
generate UHRS
-3056:16:3056 = [c(1) * EHTS80_1x, 0, c(2) * EHTS80_1x, 0, c(3) * EHTS80_1x, 0, c(4) * EHTS80_1x,
0, c(5) * EHTS80_1x, 0, c(6) * EHTS80_1x] * (1 + j) / sqrt(2). Here, UHRS
-3056:16:3056 denotes the UHR-STF of the DL MU PPDU, each of c(1), c(2), c(3), c(4), c(5) and c(6)
represents a respective optimized coefficient, a vector C of the combination of the
optimized coefficients = [c c(1) c(2) c(3) c(4) c(5) c(6)], and C = [1 1 1 1 -1 -1]
or C = [1 1 -1 -1 -1 -1].
[0040] In some implementations, in generating the STF, process 1000 may involve processor
912 generating a UHR-STF of an UL TB PPDU using a combination of optimized coefficients
such that the STF is used in the wireless communication in the 480MHz bandwidth to
generate UHRS
-3064:8:3064 = [c(1) * EHTS80_2x, 0, c(2) * EHTS80_2x, 0, c(3) * EHTS80_2x, 0, c(4) * EHTS80_2x,
0, c(5) * EHTS80_2x, 0, c(6) * EHTS80_2x] * (1 + j) / sqrt(2). Here, UHRS
-3064:8:3064 denotes the UHR-STF of the UL TB PPDU, each of c(1), c(2), c(3), c(4), c(5) and c(6)
represents a respective optimized coefficient, a vector C of the combination of the
optimized coefficients = [c(1), c(2), c(3), c(4), c(5) and c(6)], and C = [1 1 1 -1
-1 1] or C = [1 1 -1 1 -1 -1].
[0041] In some implementations, in generating the STF, process 1000 may involve processor
912 generating a UHR-STF of a DL MU PPDU using a combination of optimized coefficients
such that the STF is used in the wireless communication in the 640MHz bandwidth to
generate UHRS
-3056:16:3056 = [c(1) * EHTS80_1x, 0, c(2) * EHTS80_1x, 0, c(3) * EHTS80_1x, 0, c(4) * EHTS80_1x,
0, c(5) * EHTS80_1x, 0, c(6) * EHTS80_1x, 0, c(7) * EHTS80_1x, 0, c(8) * EHTS80_1x]
* (1 + j) / sqrt(2). Here, UHRS
-3056:16:3056 denotes the UHR-STF of the DL MU PPDU, each of c(1), c(2), c(3), c(4), c(5), c(6),
c(7) and c(8) represents a respective optimized coefficient, a vector C of the combination
of the optimized coefficients = [c(1) c(2) c(3) c(4) c(5) c(6) c(7) c(8)], and C =
[1 -1 -1 -1 -1 -1 -1 1] or C = [-1 1 1 1 1 1 1 -1].
[0042] In some implementations, in generating the STF, process 1000 may involve processor
912 generating a UHR-STF of an UL TB PPDU using a combination of optimized coefficients
such that the STF is used in the wireless communication in the 640MHz bandwidth to
generate UHRS
-3064:8:3064 = [c(1) * EHTS80_2x, 0, c(2) * EHTS80_2x, 0, c(3) * EHTS80_2x, 0, c(4) * EHTS80_2x,
0, c(5) * EHTS80_2x, 0, c(6) * EHTS80_2x, 0, c(7) * EHTS80_2x, 0, c(8) * EHTS80_2x]
* (1 + j) / sqrt(2). Here, UHRS
-3064:8:3064 denotes the UHR-STF of the UL TB PPDU, each of c(1), c(2), c(3), c(4), c(5), c(6),
c(7) and c(8) represents a respective optimized coefficient, a vector C of the combination
of the optimized coefficients = [c(1) c(2) c(3) c(4) c(5) c(6) c(7) c(8)], and C =
[1 1 1 -1 1 1 1 -1] or C = [1 1 1 -1 1 1 -1 -1].
Additional Notes
[0043] The herein-described subject matter sometimes illustrates different components contained
within, or connected with, different other components. It is to be understood that
such depicted architectures are merely examples, and that in fact many other architectures
can be implemented which achieve the same functionality. In a conceptual sense, any
arrangement of components to achieve the same functionality is effectively "associated"
such that the desired functionality is achieved. Hence, any two components herein
combined to achieve a particular functionality can be seen as "associated with" each
other such that the desired functionality is achieved, irrespective of architectures
or intermedial components. Likewise, any two components so associated can also be
viewed as being "operably connected", or "operably coupled", to each other to achieve
the desired functionality, and any two components capable of being so associated can
also be viewed as being "operably couplable", to each other to achieve the desired
functionality. Specific examples of operably couplable include but are not limited
to physically mateable and/or physically interacting components and/or wirelessly
interactable and/or wirelessly interacting components and/or logically interacting
and/or logically interactable components.
[0044] Further, with respect to the use of substantially any plural and/or singular terms
herein, those having skill in the art can translate from the plural to the singular
and/or from the singular to the plural as is appropriate to the context and/or application.
The various singular/plural permutations may be expressly set forth herein for sake
of clarity.
[0045] Moreover, it will be understood by those skilled in the art that, in general, terms
used herein, and especially in the appended claims, e.g., bodies of the appended claims,
are generally intended as "open" terms, e.g., the term "including" should be interpreted
as "including but not limited to," the term "having" should be interpreted as "having
at least," the term "includes" should be interpreted as "includes but is not limited
to," etc. It will be further understood by those within the art that if a specific
number of an introduced claim recitation is intended, such an intent will be explicitly
recited in the claim, and in the absence of such recitation no such intent is present.
For example, as an aid to understanding, the following appended claims may contain
usage of the introductory phrases "at least one" and "one or more" to introduce claim
recitations. However, the use of such phrases should not be construed to imply that
the introduction of a claim recitation by the indefinite articles "a" or "an" limits
any particular claim containing such introduced claim recitation to implementations
containing only one such recitation, even when the same claim includes the introductory
phrases "one or more" or "at least one" and indefinite articles such as "a" or "an,"
e.g., "a" and/or "an" should be interpreted to mean "at least one" or "one or more;"
the same holds true for the use of definite articles used to introduce claim recitations.
In addition, even if a specific number of an introduced claim recitation is explicitly
recited, those skilled in the art will recognize that such recitation should be interpreted
to mean at least the recited number, e.g., the bare recitation of "two recitations,"
without other modifiers, means at least two recitations, or two or more recitations.
Furthermore, in those instances where a convention analogous to "at least one of A,
B, and C, etc." is used, in general such a construction is intended in the sense one
having skill in the art would understand the convention, e.g., "a system having at
least one of A, B, and C" would include but not be limited to systems that have A
alone, B alone, C alone, A and B together, A and C together, B and C together, and/or
A, B, and C together, etc. In those instances where a convention analogous to "at
least one of A, B, or C, etc." is used, in general such a construction is intended
in the sense one having skill in the art would understand the convention, e.g., "a
system having at least one of A, B, or C" would include but not be limited to systems
that have A alone, B alone, C alone, A and B together, A and C together, B and C together,
and/or A, B, and C together, etc. It will be further understood by those within the
art that virtually any disjunctive word and/or phrase presenting two or more alternative
terms, whether in the description, claims, or drawings, should be understood to contemplate
the possibilities of including one of the terms, either of the terms, or both terms.
For example, the phrase "A or B" will be understood to include the possibilities of
"A" or "B" or "A and B."
[0046] From the foregoing, it will be appreciated that various implementations of the present
disclosure have been described herein for purposes of illustration, and that various
modifications may be made without departing from the scope of the present disclosure.
Accordingly, the various implementations disclosed herein are not intended to be limiting,
with the true scope being indicated by the following claims.
1. A method, comprising:
generating a short training field, in the following also referred to as STF, of a
physical-layer protocol data unit, in the following also referred to as PPDU, by using
a predefined STF base sequence (1010); and
performing a wireless communication in a 240MHz, 480MHz or 640MHz bandwidth with the
PPDU (1020).
2. An apparatus (910), comprising:
a transceiver (916) configured to transmit and receive wirelessly; and
a processor (912) coupled to the transceiver (916) and configured to perform operations
comprising:
generating a short training field, in the following also referred to as STF, of a
physical-layer protocol data unit, in the following also referred to as PPDU, by using
a predefined STF base sequence; and
performing, via the transceiver (916), a wireless communication in a 240MHz, 480MHz
or 640MHz bandwidth with the PPDU.
3. The method of Claim 1 or the apparatus of Claim 2, wherein the predefined STF base
sequence comprises an Institute of Electrical and Electronics Engineers, in the following
also referred to as IEEE, 802.11ax 80MHz high-efficiency, in the following also referred
to as HE, STF, in the following also referred to as HE-STF, or IEEE 802.11be extreme-high
throughput, in the following also referred to as EHT, STF, in the following also referred
to as EHT-STF, sequence.
4. The method or the apparatus of Claim 3, wherein the generating of the STF comprises
repeating the 80MHz HE-STF or EHT-STF sequence and applying a combination of coefficients
on each 80MHz frequency subblock or segment of the 240MHz, 480MHz or 640MHz bandwidth.
5. The method of Claim 1, 3, or 4, or the apparatus of any one of Claims 2 to 4, wherein
the generating of the STF comprises generating the STF of a downlink, in the following
also referred to as DL, multi-user, in the following also referred to as MU, PPDU
or an uplink, in the following also referred to as UL, trigger-based, in the following
also referred to as TB, PPDU based on:
and
wherein:
M denotes an 80MHz sub-sequence,
EHTS80_1x denotes an 80MHz segment sequence for the DL MU PPDU, and
EHTS80_2x denotes an 80MHz segment sequence for the UL TB PPDU.
6. The method or the apparatus of Claim 5, wherein the generating of the STF comprises
generating an ultra-high reliability, in the following also referred to as UHR, STF,
in the following also referred to as UHR-STF, of a DL MU PPDU using a combination
of optimized coefficients such that the STF is used in the wireless communication
in the 240MHz bandwidth, and wherein:
UHRS-1520:16:1520 denotes the UHR-STF of the DL MU PPDU,
each of c(1), c(2) and c(3) represents a respective optimized coefficient, a vector
C of the combination of the optimized coefficients = [c(1) c(2) c(3)], and
7. The method or the apparatus of Claim 5, wherein the generating of the STF comprises
generating an UHR-STF of an UL TB PPDU using a combination of optimized coefficients
such that the STF is used in the wireless communication in the 240MHz bandwidth, and
wherein:
UHRS-1528:8:1528 denotes the UHR-STF of the UL TB PPDU,
each of c(1), c(2) and c(3) represents a respective optimized coefficient, a vector
C of the combination of the optimized coefficients = [c(1) c(2) c(3)], and
8. The method or the apparatus of Claim 5, wherein the generating of the STF comprises
generating an UHR-STF of a DL MU PPDU using a combination of optimized coefficients
such that the STF is used in the wireless communication in the 480MHz bandwidth, and
wherein:
UHRS-3056:16:3056 denotes the UHR-STF of the DL MU PPDU,
each of c(1), c(2), c(3), c(4), c(5) and c(6) represents a respective optimized coefficient,
a vector C of the combination of the optimized coefficients = [c c(1) c(2) c(3) c(4)
c(5) c(6)], and
9. The method or the apparatus of Claim 5, wherein the generating of the STF comprises
generating an UHR-STF of an UL TB PPDU using a combination of optimized coefficients
such that the STF is used in the wireless communication in the 480MHz bandwidth, and
wherein:
UHRS-3064:8:3064 denotes the UHR-STF of the UL TB PPDU,
each of c(1), c(2), c(3), c(4), c(5) and c(6) represents a respective optimized coefficient,
a vector C of the combination of the optimized coefficients = [c(1), c(2), c(3), c(4),
c(5) and c(6)], and
10. The method or the apparatus of Claim 5, wherein the generating of the STF comprises
generating an UHR-STF of a DL MU PPDU using a combination of optimized coefficients
such that the STF is used in the wireless communication in the 640MHz bandwidth, and
wherein:
UHRS-3056:16:3056 denotes the UHR-STF of the DL MU PPDU,
each of c(1), c(2), c(3), c(4), c(5), c(6), c(7) and c(8) represents a respective
optimized coefficient,
a vector C of the combination of the optimized coefficients = [c(1) c(2) c(3) c(4)
c(5) c(6) c(7) c(8)], and
11. The method or the apparatus of Claim 5, wherein the generating of the STF comprises
generating an UHR-STF of an UL TB PPDU using a combination of optimized coefficients
such that the STF is used in the wireless communication in the 640MHz bandwidth, and
wherein:
UHRS-3064:8:3064 denotes the UHR-STF of the UL TB PPDU,
each of c(1), c(2), c(3), c(4), c(5), c(6), c(7) and c(8) represents a respective
optimized coefficient,
a vector C of the combination of the optimized coefficients = [c(1) c(2) c(3) c(4)
c(5) c(6) c(7) c(8)], and